The potential difference between two points in a wire apart is when the current density is

PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity

Problem

The potential difference between two points in a wire

75.0\ \text{cm}

apart is

0.938\ \text{V}

when the current density is

4.40\times10^7\ \text{A m}^{-2}

. What is (1) The magnitude of

\mathbf{E}

in the wire? (2) The resistivity of the material of which the wire is made?